Configures the specified pin to behave either as an input or an output. See the Digital Pins page for details on the functionality of the pins.
As of Arduino 1.0.1, it is possible to enable the internal pullup resistors with the mode INPUT_PULLUP. Additionally, the INPUT mode explicitly disables the internal pullups.
- pin: the Arduino pin number to set the mode of.
- mode: INPUT, OUTPUT, or INPUT_PULLUP. See the Digital Pins page for a more complete description of the functionality.
The code makes the digital pin 13 OUTPUT and Toggles it HIGH and LOW
※ NOTES AND WARNINGS:
The analog input pins can be used as digital pins, referred to as A0, A1, etc. The exception is the Arduino Nano, Pro Mini, and Mini's A6 and A7 pins, which can only be used as analog inputs.